Improvement in dampers



J. P. TUTTLE.

No.-100,692. Pafented March 8, 1870.

ItFETERS, FNOTOLWBOGBAPHER, WASHIIGTON, D C.

UNITED STATES PATENT O FIC JOSEPH P. TUTTLE, or WARREN, OHIO.

IMPROVEMENT IN DAMPERS.

Specification forming part of Letters Patent No. 100,692, dated March 8,1870.

To all whom it may concern:.

Be it known that I, JOSEPH P. TUTTLE, of Warren, in the county ofTrumbull and State of Ohio, have invented a new and useful Improvementin Heat-Retaining Valves; and I do hereby declare that the following isa full, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification.

This invention relates to a new and useful improvement in a reversibleand adjustable valve for heat and smoke conveying flues; and it consistsin forming and combining three curved plates together in such a mannerthat the central space between the plates is contracted, and the heatthereby forced outward toward the wall of the flue, where it mingleswith the unconsumed products of combustion, as will be hereinafter morefully described.

In the accompanying plate of drawings, Figure 1 represents a top or planview of the valve placed in the flue as when in use. Fig. 2 shows anedge view of the same.

Similar letters of reference indicate corresponding parts.

A represents the flue. This valve is formed of three plates, twoofwhich, B B, being connected together by the straps C O. The outer edgesof these plates conform in shape to the inside of the flue. The inneredges curve inward toward the center, so as to contract the centralspace, as seen in the drawings, Fig. 1.

D represents the other plate, which in form corresponds with the spacebetween B B, its

edges being curved inward, and its ends made,

circular, to correspond with the form of the The plate D and the platesBB are con nected together by the vertical plates F F, through which thespindle G passes, and separate the plates, as seen. The valve is hung onthis spindle, which passes through the flue,

cle surroundingthe central heated core of the current. When this currentimpinges against the valve, it will necessarily be compelled to' spreadlaterally, in consequence of the con traction of the valve at thecenter, and the more highly heated portion of thecurrent will minglewith smoke and cooler gases, and produce a more perfect combustion thanwould otherwise be obtained.

The position of the valve in the flue will depend upon the draftrequired. When starting a fire, it may be opened entirely; butordinarily the space between the plates will allow of a sufficientdischarge of the unconsumed smoke and gases. The plates of which thevalve is composed present a broad surface, and would of course becomeheated to a high degree, which would aid materially in consuming thesmoke and combustible gases. The retardation of the ascending current ofthe heatedproducts of combustion must, as a matter of course, producethis result.

The advantages to be derived from the use of this valve are perfectcontrol of the fire, utilization of an increased amount of heat, and aconsequent saving of fuel.

Having thus described my invention, I claim asnew and desire to secureby Letters Patent The plates B B, straps G, spindle G. and plate F, allconstructed and arranged to operate in the manner and for the purposedescribed.

JOSEPH P. TUTTLE.

Witnesses:

ALBERT WATSON, B. W. RATLIFF.

